Combination lock and signal means



Feb. 23, 1965 R. CALABRO 3,171,115

COMBINATION LOCK AND SIGNAL MEANS Filed Nov. 14', 1960 5 Sheets-Sheet 1 I 39 i 2 43- sq i ,J

INVENTOR.

Rocco Colo bro ATTORNEY.

Feb. 23, 1965 R. CALABRO 3,171,115

COMBINATION LOCK AND SIGNAL MEANS Filed Nov. 14. 1960 3 Sheets-Sheet 2 FIG.7

Fl 8 INVENTOR.

Rocco Colo bro BY Maxwell E. Sparrow ATTOR-NEY.

Feb. 23, 1965 Filed Nov. 14 1960 R. CALABRO COMBINATION LOCK AND SIGNAL MEANS 7 3 Sheets-Sheet 3 INVHVTOR. Rocco Colobro By Maxwell E.Spurrow ATTORNEY.

United States Patent 3,171,115 COMBINATION LOCK AND SIGNAL MEANS Rocco (Ialabro, 2215 Bronxwood Ave, Bronx, N.Y. Filed Nov. 14, 1960, Ser. No. 68,948 7 Claims. ('83. 34tl274) This invention relates to door locks, and more particularly to locking devices of the tumbler-lock type with built-in alarm or other signal mechanisms which are operated instantaneously when the lock is manipulated.

The invention consists in the novel parts, construction arrangements, combinations and improvements herein shown and described.

Objects and advantages of the invention will be set forth in part hereafter and in part will be obvious herefrom or may be learned by practicing the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

It is the object of this invention to provide for a contrivance combining a conventional door lock with a safety locking device.

A further object of the invention is to provide for means in a safety locking device for signaling an alarm every time the safety locking device is manipulated.

Yet another object of the invention is to provide fol alarm or other signal means in a safety locking device which is self-contained and which operates independently from any outside power source.

' Furthermore, it is an object of this invention to provide for a device of the kind described which is simple, sturdy, easy to operated and foolproof.

Various further and more specific purposes, features and advantages will clearly appear from the detailed description given below taken in connection with the accompanying drawings which form part of this specification and illustrate merely by way of example one embodiment of the device of the invention.

The invention consists in such novel features, arrangements and combinations of parts as may be shown and described in connection with the apparatus herein disclosed by way of example only and as illustrative of a preferred embodiment. In the following description and in the claims, parts will be identified by specific names for convenience, but such names are intended to be as generic in their application to similar parts as the part will permit. Like reference characters denote like parts in the several figures of the drawings.

FIG. 1 shows a vertical section of the safety lock;

FIG. 2 is a cross-section of the lock shown in FIG. 1, taken along the line 2-2 in FIG. 1;

FIG. 3 shows the bolt mechanism of the lock in its forward position;

FIG. 4 shows the bolt mechanism of FIG. 3 in its retracted position, operated from the inside of the door;

FIG. 5 is a view, partly in cross-section of part of the mechanism shown in FIG. 3;

FIG. 6 is a vertical section of another form of the safety lock shown in FIG. 1;

FIG. 7 is a cross-section of the lock shown in FIG. 6, taken along the line 7-7 in FIG. 6;

FIG. 8 shows the same section as in FIG. 7, with the safety locking means in the inoperative position and with the locking bolt withdrawn;

FIG. 9 shows an exploded view in perspective of the operating parts of the device shown in FIGS. 6, 7 and 8;

FIG. 10 is a cross-section along the line 1tl10 of FIG. 7;

FIG. 11 is a cross-section along the line 1111 of FIG. 8;

FIG. 12 is a diagrammatic view of the alarm elements for electric operation; and

3,17 1,1 15 Patented Feb. 23, 1965 FIG. 13 is a schematic view of the alarm elements for mechanical operation.

Referring now in more detail to the drawings illustrating a preferred embodiment by which the invention may be realized, there is shown in FIG. 1 a safety door lock generally designated by the numeral 20, which comprises a housing 21, in which a locking bolt 22 is horizontally slidably arranged between pins 23 and 24. The bolt 22 engages in a conventionally known manner the cut-out 25 of the door frame 26. The bolt 22 has a lug 27 protruding from its underside which is engaged by a lever 28- for retracting. Lever 28 is mounted on the shaft 29 which protrudes through the housing 21 to the outside of the door where it bears a conventional door knob 30, pinned to it. The bolt 22 furthermore has an extension bar 31 which pivotally mounted on said bolt 22 by means of a shaft 32 so that it can swing upwardly against the downholding pressure force of a spring 33. A V-shaped leaf spring 34, supported by a stud 35 and leaning with one leg against the wall of the housing 21, abuts with the other leg against the rear end of said extension 31, urging the entire bolt assembly 31-22 forwardly into engagement with the cut-out 25 of the door frame 26.

The extension bar 31 has an arm 36 protruding downwardly which is engaged by a lever 37. This lever 37 is mounted on a shaft 38 which is arranged coaxially with the shaft 29, and which is rotatably connected with said shaft 29. The lever 37 has a rear extension 39 which engages the lever 28 on shaft 29 after a certain angle of rotation. Shaft 38 extends to the inside of the door through the housing 21, where another conventional door knob 40 is pinned to it.

Furthermore, the extension bar 31 has near its rear end a notch 41 into which the upper part of a tumbler 42 fits. The tumbler is pivotally mounted on a stud 43 which is secured in the walls of the housing 21. The tumbler is held in its upwardly and locking position by three discs 44, 45 and 46 having cut-outs 47 and small protruding pins 48, which discs are arranged freely rotatable about a shaft 49. This shaft 49 extends through the wall of the housing 21 to the outside of the lock 22 and has there a dial knob 5i secured to it. A spring 51 circumposed the shaft 49 and abutting against the inside wall of the housing 21 and against the discs 44, 45 and 46 is arranged for keeping the locking device in operable engagement. On the lower side of the tumbler 42 is a protruding part 52 which fits into the cut-outs 47 of the discs 44, 45 and 46 when these are rotated into the corresponding positions.

A small drum 86 also is fastened to the shaft 49 so that it may rotate with the shaft any time the dial knob 50 is rotated. A brake band 53 is laid around the drum 86, held by a small adjustment screw 54 and a spring 55. One end of said brake band extends as an electric contact tongue 56 between said contacts 57 and 58 (see FIG. 12). The tongue 56 and the contacts 57, 58 are connected by wires in a conventionally known manner with a battery 66 and with the hammer solenoid 63, 64 of an electric alarm device 65.

The operation is as follows:

Dial knob 59 on shaft 49 constitutes together with the small discs 44, 45 and 46 and the tumbler 42 a conventional tumbler lock, in which the tumbler 42 drops down into the cut-outs 47 of the small discs 44, 45 and 46 when the dial knob is rotated back and forth in a predetermined sequence. When the tumbler 42 drops down, it disengages its upper part from the notch 41 of the rear extension of the locking bolt 22 and sets said bolt free. Now the outside knob 30 can be rotated, whereby the locking bolt 22 is withdrawn by the cooperation of the lever 28 and the lug 27, thus opening the door. In order to be able to open the door from the inside at any time, lever 37 on the shaft 38 can be rotated by operating the inside knob 4% against the protruding arm 36, whereby the bolt extension 31 is lifted against the force of the spring 33, so that the notch 41 and the upper part of the tumbler 42 are disengaged. After a certain angle of rotation of the knob 49, corresponding to the lifting movement of the extension Ell, the rear extension 39 of the lever 37 engages the lever 23 which then is moved to pull back the locking bolt.

Any time the, dial knob 54 is rotated in either direction, the adjustable friction between the brake band 53 and the drum 86 takes the former with the latter and causes the tongue 56 to close either the contact 57 or the contact 53 whereupon the alarm device 65 is put into operation. Obviously this feature can be used as a door bell as Well; but the main purpose is to use it as an alarm device in case an unauthorized hand tries to operate the tumbler locking device for opening the door.

Another example of the structure of the invention is shown in FlGS. 6, 7, 8, 9, l and ll. The locking bolt 22 has no extension in this case and the shaft 29 extends through the housing 21 undivided, bearing the knobs 3t and 4-9 on the outside and inside, respectively, of the door; In order to render the tumbler locking device, comprising the tumbler 42 and the discs 44, 45 and 455 having the cut-outs 47, inoperative, so that the locking bolt 22 can be operated from the inside and from the outside as it is the case with every conventional door lock, the shaft having the dial knob 59 on the outside of the door, designated in FIG. 1 and FIG. 2 by the numeral 49, is made hollow, see FIG. 10, where it is designated by the numeral 67. The discs 44, and 46 are lined up on another shaft 68 which is arranged telescopingly in said hollow shaft 67 and which extends through the housing 21 to the inside of the door, having there a knob 79. A collar 6d pinned on the shaft 68 is holding the discs 44, 4S and 46 together against the spring 51 which is held in place by a collar 71. The two shafts 67 and as are rotatably secured to one another by means of a spline, a key or any other conventionally known manner, not specifically shown in the drawing. The discs 44, 45 and 46 are guided in their operative position by the shaft 68 and by bearing plates 72., '73 and '74 which are held in place by the shaft 49 and the stud '75. In the proper position relative to the extension 52 on the underside of the tumbler 42 is a stationary key 7d attached to the inside of the housing 21 so that by pulling the knob 70 the cut-outs 47 of the discs 44, 45 and 46 can be lined up with said key 76 when these discs are in the unlocking position. Hereby the tumbler 4-3; can drop out of the notch 41 setting the locking bolt 22 free. A stud 77 in the housing 21 prevents the tumbler 42 from dropping too deep, so that it can be re-engaged by the cutouts of the discs when the knob '79 is pushed in for rendering the tumbler lock effective again. The drum 86 is secured to the hollow shaft 57 so that the alarm will go off even when the tumbler locking elements are tempo: rarily disengaged and when somebody turns the knob on the outside of the door. Corresponding pins 48 on the discs and on the collar 69 serve for torsionally connecting the assembly.

The electric alarm means comprising contacts, solenoids, batteries and bells can be replaced by mechanical alarm means, as shown in FIG. 13. A large gear 78 is pinned to the shaft 49 (FIGS. 1 and 2) or 67 (FIGS. 6-11) in place of the drum 85, engaging an intermediate pinion 79 which is attached to another larger gear 80. Intermediate pinion 7% and gear 8% are rotatably arranged on a stud 81. The larger gear 81 engages a pinion 82 which is firmly connected with a disc 83 having two swinging lugs 84 which hit a bell 85 when said disc 83 is rotated, by centrifugally swinging outwardly.

While the invention has been described and illustrated with respect to a certain particular preferred example which gives satisfactory results, it will be understood by those skilled in the art after understanding the principle of the invention, that various other changes and modifications may be made without departing from the spirit and scope of the invention and it is intended therefore in the appended claims to cover all such changes and modifications.

1 claim:

1. A combination lock comprising, in combination, a housing, a retractable locking bolt in said housing, first means operating said bolt from either side of said housing, holding means securing said bolt in its locked position, said holding means having a rotatable shaft, third means on said shaft moving said holding means into locking and unlocking position, fourth means for rendering said holding means inoperative in the unlocking position, and alarm signal means arranged in said housing for indicating rotation of said shaft in either direction, and mechanical means on saidshaft for operating said alarm signal means when said shaft is rotated in either direction.

2. A combination lock, according to claim 1, wherein said bolt securing means includes a tumbler and a plurality of rotatable discs, said fourth means rendering said bolt securing means inoperative in unlocking position comprising a telescoping shaft, 21 pulling knob on said shaft, a collar secured to said shaft for pulling said discs out of engagement with said tumbler and stationary key means arranged within said housing for keeping said discs immobile when said discs are pulled out of engagement with said tumbler.

3. A combination lock, according to claim 1, wherein said means operating said alarm signal means arranged in said housing comprise a gear train composed of a plurality of gears, 21 first gear fixedly connected to said shaft, a disc connected to the last gear of said plurality of gears, centrifugally swinging lugs on said disc and an alarm bell engageable by said lugs.

4. In a lock, the combination with a locking device which comprises a retractable locking bolt having an extension bar pivotally mounted on said bolt, a notch on said extension bar, spring means for urging said locking bolt into its locked position, first means for retracting said bolt, second means for lifting said extension bar, of a tumbler lock device comprising a shaft, a plurality of discs on said shaft, said discs having cut-outs, a dial knob on said shaft, a tumbler engaging said cut-outs and engaging said notch, and signal means comprising a drum on said shaft, an electrically operated signaling device and means connected with said drum for energizing said signal means upon rotation of said shaft in either direction.

5. A combination lock comprising a housing, a retractable locking bolt in said housing, said bolt having a notch and further having a lug protruding therefrom, spring means for urging said bolt into its locked position, a first shaft extending through said housing in a direction at right angle to said bolt, a lever-arm on said first shaft engaging said lug, first means on both ends of said first shaft outside said housing for operating said first shaft, a second shaft extending through said housing parallel to said first shaft, said second shaft having second means outside said housing for operating said second shaft, a plurality of discs freely rotatable mounted on said second shaft, said discs having cut-outs, a drum fixedly secured to said second shaft, a tumbler pivotally mounted in said housing, said tumbler engaging both said notch and said cut-outs, and means independently disengaging said tumbler from said notch and alarm signal means frictionally engaged by said drum on said second shaft for indicating rotation of said second shaft in either direction.

6. A combination lock, according to claim 5, wherein said alarm signal means comprises an adjustable brake band, a contact tongue on said brake band, electrical contacts on both sides of said tongue, a source of electric current, and an alarm signal device operated by said source of electric current upon closing either one of said electrical contacts by said tongue.

7. A combination lock comprising a housing, a retractable locking bolt in said housing, a lug protruding from said locking bolt, spring means for urging said locking bolt into its locked position, an extension bar pivotally mounted on said locking bolt, said bar having a notch and an arm protruding from said bar, a first shaft extending through said housing in a direction at right angle to said locking bolt, said shaft being composed of two parts independently rotatable, each of said parts having an operating knob disposed outside said housing and a lever-arm inside said housing, said lever of one part engaging said lug, said lever-arm of the other part engaging said arm whereby upon rotation of said other part of said shaft said bar can be swung upwardly, a second shaft extending through said housing parallel to said first shaft, said second shaft having a dial disc outside said housing, a plurality of freely rotatable discs mounted upon said second shaft, said discs held together in frictional engagement and having cut-outs, a drum fixedly secured to said second shaft, a tumbler pivotally mounted in said housing, said tumbler engaging said notch in said bar when said bar is in a downward position, a protrud- 6 ing part on said tumbler engaging said cut-outs and alarm signal means frictionally engaging said drum on said second shaft for indicating rotation of said second shaft.

References Cited by the Examiner UNITED STATES PATENTS 491,868 2/93 Bowley -150 742,073 10/03 Schubert 340-274 770,555 9/04 Bourne 116-158 775,723 11/04 Get-to 340-274 937,941 10/09 Jacobson 109-44 949,994 2/ 10 Callan ZOO-61.39 XR 1,065,861 6/ 13 Brewster 340-274 1,107,767 8/ 14 Dick 340-274 1,151,335 8/15 Bethke 70-150 1,188,003 6/16 Metcalf 70-150 XR 1,338,796 5/20 Staver 70-145 1,554,839 9/25 Brown 70-150 1,947,332 2/34 Christen ZOO-153.15 1,981,163 11/34 Carlson 70-150 3,056,125 9/ 62 Harry 340-274 NEIL C. READ, Primary Examiner.

BENNETT G. MILLER, Examiner. 

1. A COMBINATION LOCK COMPRISING, IN COMBINATION, A HOUSING, A RETRACTABLE LOCKING BOLT IN SAID HOUSING, FIRST MEANS OPERATING SAID BOLT FROM EITHER SIDE OF SAID HOUSING, HOLDING MEANS SECURING SAID BOLT IN ITS LOCKED POSITION, SAID HOLDING MEANS HAVING A ROTATABLE SHAFT, THIRD MEANS ON SAID SHAFT MOVING SAID HOLDING MEANS INTO LOCKING AND UNLOCKING POSITION, FOURTH MEANS FOR RENDERING SAID HOLDING MEANS INOPERATIVE IN THE UNLOCKING POSITION, AND ALARM SIGNAL MEANS ARRANGED IN SAID HOUSING FOR INDICATING ROTATION OF SAID SHAFT IN EITHER DIRECTION, AND MECHANICAL MEANS ON SAID SHAFT FOR OPERATING SAID ALARM SIGNAL MEANS WHEN SAID SHAFT IS ROTATED IN EITHER DIRECTION. 